JPH05179148A - Water absorbent containing temperature-sensitive, water-absorbing and-releasing resin, and method for decreasing water content of powdered or particulate material using water absorbent - Google Patents
Water absorbent containing temperature-sensitive, water-absorbing and-releasing resin, and method for decreasing water content of powdered or particulate material using water absorbentInfo
- Publication number
- JPH05179148A JPH05179148A JP35915891A JP35915891A JPH05179148A JP H05179148 A JPH05179148 A JP H05179148A JP 35915891 A JP35915891 A JP 35915891A JP 35915891 A JP35915891 A JP 35915891A JP H05179148 A JPH05179148 A JP H05179148A
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- JP
- Japan
- Prior art keywords
- water
- absorbing
- sensitive
- absorbing agent
- polymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Coke Industry (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Drying Of Solid Materials (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、吸水剤およびその吸水
剤を用いて、水分を含有する粉粒体から水分を低減する
方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-absorbing agent and a method for reducing the water content from a granular material containing the water by using the water-absorbing agent.
【０００２】[0002]
【従来の技術】コークス原料炭など粉粒体中の水分を低
減させるには、原料炭と吸水性樹脂とを混合し、水分を
吸水性樹脂に吸着させ、次いで、吸水性樹脂を回収、乾
燥の後、再使用する方法が用いられている（特開昭６１
−１５１２９４号公報）。この方法は、吸水性樹脂をそ
のまま、または必要に応じて焼結鉄球などの容器に充填
して原料炭と混合し、その後、ふるい分けあるいは磁石
を用いて分離回収するものである。吸水性樹脂としては
アクリルアミド誘導体を主成分とする三次元架橋ポリマ
ーが使用されている。この三次元架橋ポリマーは温度変
化によって吸水、脱水を繰り返す特性を有する感温吸脱
水性樹脂であって、該樹脂に吸着された水分の分離には
高温加熱を必要としない等の利点がある。しかし、吸水
性樹脂と原料炭とを直接混合する場合には、混合中に吸
水性樹脂が微小化し、そのために、ふるい分けによる分
離が困難になる等の問題が生じる。また、適当な容器中
に該樹脂を充填して原料炭と混合する場合には、樹脂と
原料炭とが直接接触する割合が小さいため、効率良く吸
水が出来ないなどの問題が生じた。2. Description of the Related Art In order to reduce the water content in a granular material such as coke raw coal, the raw coal and a water absorbent resin are mixed, the water is absorbed by the water absorbent resin, and then the water absorbent resin is recovered and dried. After that, a method of reusing is used (Japanese Patent Laid-Open No. Sho 61-61).
No. 151,294). In this method, the water-absorbent resin is filled as it is or, if necessary, in a container such as a sintered iron ball and mixed with the raw coal, and then separated and recovered by sieving or using a magnet. As the water absorbent resin, a three-dimensional crosslinked polymer containing an acrylamide derivative as a main component is used. This three-dimensional crosslinked polymer is a temperature-sensitive water-absorbing / dehydrating resin having the property of repeating water absorption and dehydration according to temperature changes, and has the advantage that high temperature heating is not required to separate the water adsorbed by the resin. However, when the water-absorbent resin and the raw material carbon are directly mixed, the water-absorbent resin becomes minute during the mixing, which causes a problem that separation by sieving becomes difficult. Further, when the resin is filled in a suitable container and mixed with the raw coal, the ratio of direct contact between the resin and the raw coal is small, so that there is a problem that water cannot be efficiently absorbed.
【０００３】[0003]
【発明が解決しようとする課題】そこで本発明者らは粉
粒体と吸水剤との接触効率を改善し、さらに、粉粒体と
吸水剤との分離を改良すべく鋭意研究した結果、感温吸
脱水性樹脂、磁性体とを組み合わせることにより、効率
よく再使用出来ることを見いだし本発明を完成するに至
った。Therefore, the present inventors have conducted extensive studies to improve the contact efficiency between the powder and the water absorbing agent and further improve the separation between the powder and the water absorbing agent. By combining a heat-absorbing / dehydrating resin and a magnetic material, they have found that they can be reused efficiently, and have completed the present invention.
【０００４】[0004]
【課題を解決するための手段】かくして本発明によれ
ば、（１）感温吸脱水性樹脂、磁性体を含有する吸水
剤、および、（２）感温吸脱水性樹脂、磁性体およびゴ
ム状重合体を含有する吸水剤が提供される。また本発明
によれば、（３）感温吸脱水性樹脂、磁性体を含有する
吸水剤、または、感温吸脱水性樹脂、磁性体およびゴム
状重合体を含有する吸水剤と水分を含有する粉粒体とを
接触させ、次いで磁気を用いて該吸水剤を粉粒体から分
離することを特徴とする、水分を含有する粉粒体の水分
低減方法が提供される。Thus, according to the present invention, (1) a temperature-sensitive water-absorbing / dehydrating resin, a water-absorbing agent containing a magnetic substance, and (2) a temperature-sensitive water-absorbing / dehydrating resin, a magnetic substance and a rubber. A water absorbing agent containing a polymer is provided. Further, according to the present invention, (3) a water-absorbing agent containing a temperature-sensitive water-absorbing and dehydrating resin and a magnetic substance, or a water-absorbing agent containing a temperature-sensitive water-absorbing and dehydrating resin, a magnetic substance and a rubber-like polymer and water The method for reducing the water content of a granular material containing water is provided, which comprises contacting the granular material with a powder, and then magnetically separating the water absorbing agent from the granular material.
【０００５】本発明において使用される感温吸脱水性樹
脂は、物理的または化学的に三次元に架橋された高分子
網目内に水が吸着された含水ゲルを生成する有機高分子
化合物であって、臨界温度の前後でその体積が２〜１０
００倍程度変化し、これにより吸水および脱水を可逆的
に繰り返す含水ゲルを生成するものである。臨界温度は
該有機高分子化合物の架橋密度等によって決まるが、通
常は５〜９０℃の範囲に存在する。具体例としてはＮ−
置換（メタ）アクリルアミド化合物、および／または、
ビニルエーテル化合物を単量体として得られる重合体ま
たは共重合体を三次元架橋したものが挙げられる。The temperature-sensitive water-absorbing / dehydrating resin used in the present invention is an organic polymer compound which forms a hydrogel having water adsorbed in a polymer network which is physically or chemically three-dimensionally cross-linked. The volume is 2-10 before and after the critical temperature.
The water-containing gel changes about 00 times, and thereby water absorption and dehydration are reversibly repeated. The critical temperature depends on the cross-linking density of the organic polymer compound and the like, but usually exists in the range of 5 to 90 ° C. As a specific example, N-
A substituted (meth) acrylamide compound, and / or
A polymer or copolymer obtained by using a vinyl ether compound as a monomer is three-dimensionally crosslinked.
【０００６】Ｎ−置換（メタ）アクリルアミド化合物
は、そのアミド基の水素がアルキル基、アリール基、ア
ラルキル基、アルコキシ基等の有機基で置換されたもの
であって、具体的には、アルキル基で置換されたものと
してはＮ−エチル（メタ）アクリルアミド、Ｎ，Ｎ−ジ
エチル（メタ）アクリルアミド、Ｎ−メチル−Ｎ−エチ
ル（メタ）アクリルアミド、Ｎ−イソプロピル（メタ）
アクリルアミド、Ｎ，Ｎ−ジイソプロピル（メタ）アク
リルアミド、Ｎ−イソブチル（メタ）アクリルアミド、
Ｎ−シクロヘキシル（メタ）アクリルアミド等；アリー
ル基で置換されたものとしてはＮ−フエニル（メタ）ア
クリルアミド等；アラルキル基で置換されたものとして
はＮ−ベンジル（メタ）アクリルアミド等；アルコキシ
基で置換されたものとしてはＮ−イソプロピオキシ（メ
タ）アクリルアミド等が挙げられる。また、ビニルエー
テル化合物としてはメチルビニルエーテルが挙げられ
る。The N-substituted (meth) acrylamide compound is a compound in which hydrogen of the amide group is substituted with an organic group such as an alkyl group, an aryl group, an aralkyl group and an alkoxy group. Substituted with N-ethyl (meth) acrylamide, N, N-diethyl (meth) acrylamide, N-methyl-N-ethyl (meth) acrylamide, N-isopropyl (meth)
Acrylamide, N, N-diisopropyl (meth) acrylamide, N-isobutyl (meth) acrylamide,
N-cyclohexyl (meth) acrylamide, etc .; those substituted with an aryl group, N-phenyl (meth) acrylamide, etc .; those substituted with an aralkyl group, N-benzyl (meth) acrylamide, etc .; substituted with an alkoxy group N-isopropoxy (meth) acrylamide etc. are mentioned as a thing. In addition, examples of the vinyl ether compound include methyl vinyl ether.
【０００７】Ｎ−置換（メタ）アクリルアミド化合物ま
たはビニルエーテル化合物と共重合する単量体として
は、（メタ）アクリルアミド、（メタ）アクリル酸エス
テル、（メタ）アクリロニトリル、スチレン、酢酸ビニ
ル、マレイン酸エステル等が挙げられる。これら共重合
性単量体は４０モル％以下で、好ましくは、２０モル％
以下の範囲で共重合することができる。さらに通常は、
Ｎ、Ｎ−メチレン−ビスアクリルアミド、エチレングリ
コールジメタアクリレート、グリセリントリアクリレー
ト、ジビニルベンゼン等の架橋性単量体を、０．１〜１
０モル％の範囲で共重合する。Examples of the monomer copolymerizable with the N-substituted (meth) acrylamide compound or vinyl ether compound include (meth) acrylamide, (meth) acrylic acid ester, (meth) acrylonitrile, styrene, vinyl acetate and maleic acid ester. Is mentioned. These copolymerizable monomers are 40 mol% or less, preferably 20 mol%
Copolymerization is possible within the following range. More usually,
Crosslinking monomers such as N, N-methylene-bisacrylamide, ethylene glycol dimethacrylate, glycerin triacrylate and divinylbenzene are added in an amount of 0.1 to 1
Copolymerize in the range of 0 mol%.
【０００８】なお、Ｎ−置換（メタ）アクリルアミド化
合物を単量体として得られる重合体または共重合体、お
よび、ビニルエーテル化合物を単量体として得られる重
合体または共重合体の架橋は、上記架橋性単量体を共重
合する方法によっても達成できるが、これらの重合体ま
たは共重合体を合成した後、適当な架橋剤によって架橋
する方法、γ線等の放射線を照射する方法等によって架
橋することも可能である。The cross-linking of the polymer or copolymer obtained by using the N-substituted (meth) acrylamide compound as a monomer and the polymer or copolymer obtained by using the vinyl ether compound as a monomer are the above-mentioned cross-linking. It can also be achieved by a method of copolymerizing a polymerizable monomer, but after synthesizing these polymers or copolymers, a method of crosslinking with a suitable crosslinking agent, a method of irradiating radiation such as γ-rays, etc. It is also possible.
【０００９】Ｎ−置換（メタ）アクリルアミド化合物ま
たはビニルエーテル化合物を重合するには従来公知の方
法を用いることができ特に限定されないが、通常は、有
機または無機過酸化物等のラジカル開始剤を用いてラジ
カル重合する方法が用いられる。A conventionally known method can be used for polymerizing the N-substituted (meth) acrylamide compound or the vinyl ether compound, and the method is not particularly limited. Usually, a radical initiator such as an organic or inorganic peroxide is used. A method of radical polymerization is used.
【００１０】本発明において使用される磁性体は、磁性
を有する物質の粉末であれば特に限定されないが、例え
ば純鉄の粉末、あるいはＦｅ−Ｎｉ、Ｆｅ−Ｓｉ、Ｆｅ
−Ａｌ、Ｆｅ−Ｃｏのような鉄合金の粉末、またはα−
Ｆｅ2０3、Ｆｅ3０4のような酸化磁性材料の粉末などが
挙げられ、弱磁性体よりも強磁性体が好ましい。The magnetic material used in the present invention is not particularly limited as long as it is a powder of a substance having magnetism. For example, pure iron powder, Fe-Ni, Fe-Si, Fe.
-Al, powder of iron alloy such as Fe-Co, or α-
Examples include powders of oxide magnetic materials such as Fe 2 O 3 and Fe 3 0 4 , and a ferromagnetic substance is preferable to a weak magnetic substance.
【００１１】本発明の吸水剤に使用される磁性体の量
は、水分を吸着した吸水剤を磁気によって粉粒体から分
離することができる量であれば特に限定されないが、通
常は、吸水剤に使用される感温吸脱水性樹脂１００重量
部に対して、磁性体５部以上１０００重量部以下、好ま
しくは５０〜６００重量部である。磁性体の使用量が５
重量部未満では、水分を吸着した吸水剤を磁石によって
粉粒体から分離することが困難になり、また、１０００
重量部を超えると磁性体の脱落する量が増加するので好
ましくない。The amount of the magnetic substance used in the water absorbing agent of the present invention is not particularly limited as long as it is an amount capable of magnetically separating the water absorbing agent that has adsorbed water from the granular material, but usually, the water absorbing agent is used. 5 parts by weight or more and 1000 parts by weight or less, and preferably 50 to 600 parts by weight, based on 100 parts by weight of the temperature-sensitive water-absorbing / dehydrating resin used in. The amount of magnetic material used is 5
If the amount is less than 100 parts by weight, it becomes difficult to separate the water-absorbing agent that has adsorbed water from the granular material by the magnet.
If it exceeds the weight part, the amount of the magnetic material that falls off increases, which is not preferable.
【００１２】本発明の吸水剤は、必要に応じてゴム状重
合体を混合することによって吸水剤としての強度を増加
することができる。使用されるゴム状重合体は室温にお
いてゴム状態であって、数平均分子量が１００００以上
の重合体であれば特に限定されないが、たとえば、共役
ジエン系重合体、不飽和カルボン酸と不飽和カルボン酸
エステルとのゴム状重合体等が挙げられる。具体的に
は、共役ジエン系重合体としては、ポリブタジエンゴ
ム、ポリイソプレンゴム、ポリクロロプレンゴム、ポリ
（2,3-ジメチルブタジエン）、ポリ（1,3-ペンタジエ
ン）、アクリルニトリル−ブタジエンゴム、スチレン−
ブタジエンゴム、スチレン−イソプレンゴム、ポリ（α
−メチルスチレン／ブタジエン）ゴム状共重合体等；不
飽和カルボン酸と不飽和カルボン酸エステルとのゴム状
重合体としては、アクリルゴム等が挙げられる。さら
に、その他のゴム状重合体としてはシリコンゴム、エピ
クロルヒドリン系ゴム等が挙げられる。また、スチレン
−ブタジエンブロック共重合体ゴム、スチレン−イソプ
レンブロック共重合体ゴム等の熱可塑性エラストマー、
さらに、天然ゴムを用いることも可能である。The water-absorbing agent of the present invention can increase the strength as a water-absorbing agent by mixing a rubber-like polymer, if necessary. The rubber-like polymer used is not particularly limited as long as it is in a rubber state at room temperature and has a number average molecular weight of 10,000 or more. For example, a conjugated diene polymer, an unsaturated carboxylic acid and an unsaturated carboxylic acid can be used. Examples thereof include rubbery polymers with esters. Specific examples of the conjugated diene polymer include polybutadiene rubber, polyisoprene rubber, polychloroprene rubber, poly (2,3-dimethylbutadiene), poly (1,3-pentadiene), acrylonitrile-butadiene rubber, and styrene. −
Butadiene rubber, styrene-isoprene rubber, poly (α
-Methylstyrene / butadiene) rubber-like copolymer and the like; examples of the rubber-like polymer of unsaturated carboxylic acid and unsaturated carboxylic acid ester include acrylic rubber. Furthermore, examples of other rubber-like polymers include silicone rubber and epichlorohydrin rubber. Further, a thermoplastic elastomer such as styrene-butadiene block copolymer rubber, styrene-isoprene block copolymer rubber,
Furthermore, it is also possible to use natural rubber.
【００１３】ゴム状重合体の中でも、ガラス転移温度が
−２０℃以下のゴム状重合体が好ましく、感温吸脱水性
樹脂および磁性体と良好な混合物を形成することができ
る。また、ガラス転移温度を２個以上有するブロック共
重合体の場合は、そのうちの少なくとも１つのガラス転
移温度が−２０℃以下であることが好ましい。Among the rubber-like polymers, rubber-like polymers having a glass transition temperature of −20 ° C. or lower are preferable and can form a good mixture with the temperature-sensitive water-absorbing / dehydrating resin and the magnetic substance. Further, in the case of a block copolymer having two or more glass transition temperatures, it is preferable that at least one of them has a glass transition temperature of -20 ° C or lower.
【００１４】さらに、本発明において使用されるゴム状
重合体の使用量は、感温吸脱水性樹脂および磁性体と混
合可能な量でであれば特に制限されないが、通常は感温
吸脱水性樹脂１００重量部に対してゴム状重合体０．１
重量部以上２５重量部以下、好ましくは１〜１０重量部
である。Further, the amount of the rubber-like polymer used in the present invention is not particularly limited as long as it is an amount that can be mixed with the temperature-sensitive water-absorbing and dehydrating resin and the magnetic substance, but it is usually the temperature-sensitive water-absorbing and dehydrating property. Rubber-like polymer 0.1 to 100 parts by weight of resin
It is not less than 25 parts by weight and preferably not more than 1 part by weight.
【００１５】本発明の吸水剤は、磁性体および感温吸脱
水性樹脂と水とから成る含水ゲルを製造し、次いで該含
水ゲルを乾燥することによって製造することができる。
含水ゲルを製造する方法は、感温吸脱水性樹脂の高分子
網目に適当な量の水を吸着させ、次いで磁性体と混合す
る方法；感温吸脱水性樹脂と水と磁性体とを、一括して
混合する方法；Ｎ−置換（メタ）アクリルアミド化合物
を単量体として得られる重合体または共重合体もしくは
ビニルエーテル化合物を単量体として得られる重合体ま
たは共重合体の水溶液中に、磁性体を添加して混合し、
次いで適当な方法で該重合体または共重合体を架橋する
方法；Ｎ−置換（メタ）アクリルアミド化合物またはビ
ニルエーテル化合物と磁性体とを混合し、次いで該化合
物を重合した後架橋する方法等が挙げられる。また、必
要に応じてゴム状重合体を混合する場合は、これらの製
造方法において磁性体および感温吸脱水性樹脂等と適宜
混合する。なお、ゴム状重合体をゴム系ラテックスの状
態で使用すると、感温吸脱水性樹脂および磁性体との混
合状態が特に良好な吸水剤が得られる。The water absorbing agent of the present invention can be produced by producing a hydrogel comprising a magnetic substance, a temperature-sensitive water-absorbing / dehydrating resin and water, and then drying the hydrogel.
The method for producing a water-containing gel is as follows: a suitable amount of water is adsorbed on the polymer network of the temperature-sensitive water-absorbing / dehydrating resin and then mixed with a magnetic substance; Method of mixing all at once; magnetic properties in an aqueous solution of a polymer or copolymer obtained by using an N-substituted (meth) acrylamide compound as a monomer or a polymer or copolymer obtained by using a vinyl ether compound as a monomer. Add the body and mix,
Then, a method of crosslinking the polymer or copolymer by an appropriate method; a method of mixing an N-substituted (meth) acrylamide compound or a vinyl ether compound with a magnetic material, and then polymerizing the compound and then crosslinking. .. In addition, when a rubbery polymer is mixed as needed, it is appropriately mixed with a magnetic material, a temperature-sensitive water-absorbing / dehydrating resin and the like in these production methods. When the rubber-like polymer is used in the form of a rubber-based latex, a water absorbing agent having a particularly good mixed state with the temperature-sensitive water-absorbing / dehydrating resin and the magnetic substance can be obtained.
【００１６】磁性体を含有した含水ゲルは、適宜含水ゲ
ル中の水分を減少させるために乾燥する。含水ゲル中の
水分を減少させる方法としては、臨界温度の前後で体積
が収縮して水分を分離する感温吸脱水性樹脂の性質を利
用して、通常は、３０〜８０℃の温度範囲で含水ゲルを
加温する。また、必要に応じて、該含水ゲルが分解しな
い温度範囲で、好ましくは１００℃〜１８０℃で、乾燥
機等を用いて少なくとも３０分間加熱乾燥することによ
り、さらに水分を減少させることができる。The hydrogel containing a magnetic material is appropriately dried to reduce the water content in the hydrogel. As a method of reducing the water content in the water-containing gel, the property of a temperature-sensitive water-absorbing / dehydrating resin that contracts the volume to separate the water before and after the critical temperature is utilized, and usually in the temperature range of 30 to 80 ° C. Warm the hydrogel. Further, if necessary, the water content can be further reduced by heating and drying at a temperature range in which the hydrogel does not decompose, preferably at 100 ° C to 180 ° C for at least 30 minutes using a dryer or the like.
【００１７】本発明の吸水剤は、適当な大きさに調整し
て使用する。吸水剤の大きさは、粉粒体と吸水剤とが充
分に接触出来る大きさであれば特に限定されないが、通
常は粒径０．５〜５ｍｍであって、好ましくは粒径１〜
３ｍｍである。吸水剤の粒径が小さすぎると、充分な量
の磁性体を含有することが出来なくなり、水分を吸着し
た吸水剤を磁気によって粉粒体から分離することが出来
なくなる。また、大きすぎると、粉粒体と吸水剤との接
触効率が低下するので好ましくない。The water absorbing agent of the present invention is used after being adjusted to an appropriate size. The size of the water-absorbing agent is not particularly limited as long as the powdery particles and the water-absorbing agent can be in sufficient contact, but the particle size is usually 0.5 to 5 mm, preferably 1 to
It is 3 mm. If the particle size of the water absorbing agent is too small, it becomes impossible to contain a sufficient amount of the magnetic substance, and it becomes impossible to magnetically separate the water absorbing agent that has adsorbed water from the granular material. On the other hand, if it is too large, the contact efficiency between the powder and the water-absorbing agent decreases, which is not preferable.
【００１８】本発明の吸水剤を用いて、粉粒体の水分を
低減させる方法は、まず粉粒体と吸水剤とを機械的に混
合し、水分が吸水剤に吸着するのに充分な時間接触させ
る。接触時間はとくに限定されないが、通常は３分以上
４時間以内、好ましくは３０分〜２時間である。次いで
磁気を用いて吸水剤を粉粒体から分離する。分離回収し
た吸水剤は、加熱乾燥機などを用いて水分を除去し、繰
り返して使用することが出来る。The method of reducing the water content of the powder or granules using the water absorbing agent of the present invention is as follows. Contact. The contact time is not particularly limited, but is usually 3 minutes or more and 4 hours or less, preferably 30 minutes to 2 hours. The water absorbent is then magnetically separated from the granules. The separated and collected water-absorbing agent can be used repeatedly by removing water using a heating dryer or the like.
【００１９】粉粒体と接触させる吸水剤の量は、吸水剤
中の感温吸脱水性樹脂の量が、粉粒体中の水分を充分吸
着できる量以上であれば特に限定されないが、通常は粉
粒体１００重量部に対して、吸水剤中の感温吸脱水性樹
脂０．００５重量部以上２５重量部以下であり、好まし
くは、１〜１０重量部である。The amount of the water-absorbing agent to be brought into contact with the granular material is not particularly limited as long as the amount of the temperature-sensitive water-absorbing / dehydrating resin in the water-absorbing agent is not less than the amount capable of sufficiently adsorbing the moisture in the granular material. Is 0.005 parts by weight or more and 25 parts by weight or less, and preferably 1 to 10 parts by weight, with respect to 100 parts by weight of the granular material.
【００２０】本発明に使用される磁気は、粉粒体の量、
形状等により任意に選択されるが、例えば電磁吊下磁選
機、永磁吊下磁選機、電磁ドラム、電磁プーリー、マグ
ネットコンベア、電磁丸型等の一般に用いられている磁
選機等の磁石を用いることが出来る。本発明を用いて、
水分を低減させることが出来る粉粒体には、例えば、ア
ルミナ、けい砂、砕石、クレー、タルク、セメント、カ
ーボンブラック、活性汚泥、石炭あるいは木屑などが挙
げられるが、さらに、磁性のある粉粒体には適用できな
いが、食品、化学、製紙、金属鉱山、鋳造、窯業など広
い分野にわたって適用が可能である。The magnetism used in the present invention is determined by the amount of powder,
Although it is arbitrarily selected depending on the shape and the like, for example, a magnet such as an electromagnetic suspension magnetic separator, a permanent magnetic suspension magnetic separator, an electromagnetic drum, an electromagnetic pulley, a magnet conveyor, or an electromagnetic round shape is used. You can Using the present invention,
Examples of the granular material capable of reducing the water content include alumina, silica, crushed stone, clay, talc, cement, carbon black, activated sludge, coal, and wood chips, and the magnetic granular particles. Although not applicable to the body, it can be applied to a wide range of fields such as food, chemistry, paper manufacturing, metal mining, casting, and ceramics.
【００２１】[0021]
【実施例】以下に実施例を挙げて本発明を更に具体的に
説明する。実施例中の部および％は重量基準である。ま
た、実施例中の粉炭の残留水分、粉炭の嵩密度、吸水剤
の回収率、磁石、磁性体は下記の通りである。 （粉炭の残留水分）粉炭をオーブン中、１０７℃で１
時間乾燥し、この時の重量減少量と、その乾燥前重量と
の比を求めた。 （粉炭の嵩密度）５００ｃｃの粉炭の室温における重
量を測定して求めた。 （吸水剤の回収率）元素分析により求めた。 （磁石）マグネチックベースＭＢ−ＢＶ 鐘通工業株
式会社製 （磁性体）鉄粉（２００メッシュ透過率９０％以上）EXAMPLES The present invention will be described in more detail with reference to the following examples. Parts and% in the examples are by weight. In addition, the residual water content of the pulverized coal, the bulk density of the pulverized coal, the water absorbing agent recovery rate, the magnet, and the magnetic substance in the examples are as follows. (Residual water content of pulverized coal) Pulverized coal in an oven at 107 ° C for 1
After drying for an hour, the ratio of the weight reduction amount at this time and the weight before drying was determined. (Bulk density of pulverized coal) It was determined by measuring the weight of 500 cc of pulverized coal at room temperature. (Recovery rate of water absorbing agent) Obtained by elemental analysis. (Magnet) Magnetic base MB-BV manufactured by Kanetsu Kogyo Co., Ltd. (Magnetic material) Iron powder (200 mesh transmittance 90% or more)
【００２２】（実施例１〜３、比較例１〜３）Ｎ−イソ
プロピルアクリルアミド１００部とＮ，Ｎ−ビスアクリ
ルアミド６．６部とを、重合開始剤として過硫酸アンモ
ニウム０．４部および重亜硫酸ナトリウム０．４部を使
用し、水２０００部を溶媒として、４０℃で５時間重合
し感温吸脱水性樹脂を合成した。得られた感温吸脱水性
樹脂１００部、鉄粉１００部および水２００部を混合
し、次いで、１００℃で３時間乾燥した後粉砕して粒径
１〜３ｍｍの吸水剤を調製した。この吸水剤６部と水分
を９％含有する粉炭（嵩密度 ０．７２ｇ／ｃｃ）２０
００部とを混合し、３時間静置後磁石を用いて吸水剤を
回収して、粉炭の残留水分等を測定した。さらに、回収
した吸水剤は６０℃で３０分間加温し、吸水量の約７０
％を放出させた後繰り返して使用した。また、比較例と
して該吸水剤を焼結鉄球に充填したものを粉炭と混合
し、次いで、磁石を用いて回収し、粉炭の残留水分等を
測定した。結果を表１に示す。(Examples 1 to 3 and Comparative Examples 1 to 3) 100 parts of N-isopropylacrylamide and 6.6 parts of N, N-bisacrylamide were used as a polymerization initiator, 0.4 parts of ammonium persulfate and sodium bisulfite. 0.4 parts was used, 2000 parts of water was used as a solvent, and polymerization was carried out at 40 ° C. for 5 hours to synthesize a temperature-sensitive water-absorbing / dehydrating resin. 100 parts of the obtained temperature-sensitive water-absorbing / dehydrating resin, 100 parts of iron powder and 200 parts of water were mixed, dried at 100 ° C. for 3 hours and then pulverized to prepare a water-absorbing agent having a particle diameter of 1 to 3 mm. Pulverized coal containing 6 parts of this water absorbing agent and 9% of water (bulk density 0.72 g / cc) 20
The water absorbing agent was collected by using a magnet, and the residual water content of the pulverized coal was measured. Furthermore, the recovered water-absorbing agent was heated at 60 ° C for 30 minutes to obtain a water absorption of about 70%.
% Was released and used repeatedly. In addition, as a comparative example, a water-absorbing agent filled in a sintered iron ball was mixed with pulverized coal and then collected using a magnet to measure the residual water content of the pulverized coal. The results are shown in Table 1.
【００２３】[0023]
【表１】 [Table 1]
【００２４】表１から、本発明の吸水剤を使用すること
により、粉炭中の残留水分は効率良く低減され、さら
に、粉炭の嵩密度を向上させることがわかる。From Table 1, it can be seen that by using the water absorbing agent of the present invention, the residual water content in the pulverized coal is efficiently reduced and the bulk density of the pulverized coal is improved.
【００２５】[0025]
【発明の効果】かくして本発明によれば、新規な吸水剤
が得られ、また、該吸水剤を用いることにより水分を含
有する粉粒体から効率良く水分を低減させる方法が提供
される。さらに、コークス用原料炭に適用した場合は、
効率良く水分を低減できる効果に加えて、コークス炉へ
の充填密度が向上し、さらにコークスの品質を向上させ
ることができる。As described above, according to the present invention, a novel water-absorbing agent can be obtained, and a method for efficiently reducing the water content from powder-containing particles by using the water-absorbing agent is provided. Furthermore, when applied to coking coking coal,
In addition to the effect of efficiently reducing water content, the packing density in the coke oven is improved, and the quality of coke can be further improved.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｃ１０Ｂ 57/10 8018−4Ｈ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location // C10B 57/10 8018-4H
Claims (3)
する吸水剤。1. A water absorbing agent containing a temperature-sensitive water-absorbing and dehydrating resin and a magnetic material.
状重合体を含有する吸水剤。2. A water absorbing agent containing a temperature-sensitive water-absorbing / dehydrating resin, a magnetic substance and a rubber-like polymer.
分を含有する粉粒体とを接触させ、次いで磁気を用いて
該吸水剤を粉粒体から分離することを特徴とする、水分
を含有する粉粒体の水分低減方法。3. The water absorbing agent according to claim 1 or 2, and the powdery particles containing water are brought into contact with each other, and then the water absorbing agent is separated from the powdery particles using magnetism. A method for reducing water content of a granular material containing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35915891A JPH05179148A (en) | 1991-12-27 | 1991-12-27 | Water absorbent containing temperature-sensitive, water-absorbing and-releasing resin, and method for decreasing water content of powdered or particulate material using water absorbent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35915891A JPH05179148A (en) | 1991-12-27 | 1991-12-27 | Water absorbent containing temperature-sensitive, water-absorbing and-releasing resin, and method for decreasing water content of powdered or particulate material using water absorbent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05179148A true JPH05179148A (en) | 1993-07-20 |
Family
ID=18463047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35915891A Pending JPH05179148A (en) | 1991-12-27 | 1991-12-27 | Water absorbent containing temperature-sensitive, water-absorbing and-releasing resin, and method for decreasing water content of powdered or particulate material using water absorbent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05179148A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001199802A (en) * | 2000-01-21 | 2001-07-24 | Kumiai Chem Ind Co Ltd | Solid agrochemical composition |
| JP2019006979A (en) * | 2017-06-20 | 2019-01-17 | 新日鐵住金株式会社 | Method for producing coke and pre-treatment equipment for coal used for coke production |
-
1991
- 1991-12-27 JP JP35915891A patent/JPH05179148A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001199802A (en) * | 2000-01-21 | 2001-07-24 | Kumiai Chem Ind Co Ltd | Solid agrochemical composition |
| JP4617530B2 (en) * | 2000-01-21 | 2011-01-26 | クミアイ化学工業株式会社 | Solid agrochemical composition |
| JP2019006979A (en) * | 2017-06-20 | 2019-01-17 | 新日鐵住金株式会社 | Method for producing coke and pre-treatment equipment for coal used for coke production |
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